def summ(shop_dict):
    key_max = ""
    value_sum = 0
    for key in shop_dict:
        if sum(shop_dict[key]) > value_sum:
            value_sum = sum(shop_dict[key])
            key_max = key
    return key_max

assert summ({'продукты':[450, 500, 700], 'обучение': [4000, 360], 'одежда' :[7600, 10500]}) == 'одежда'
assert summ({'развлечения':[4200, 800], 'транспорт': [28, 28, 28, 360]}) == 'развлечения'
assert summ({'medicine':[5600, 8900, 1700], 'insurance': [12500.80, 17000], 'health food' :[6700, 5400.90, 1200]}) == 'insurance'